Submission #735042

#	Time	Username	Problem	Language	Result	Execution time	Memory
735042		baokhue232005	A Difficult(y) Choice (BOI21_books)	C++14	100 / 100	1 ms	364 KiB

books

#include"books.h"
#include<bits/stdc++.h>
using namespace std;

vector<int> sax;
#define all(flg) flg.begin(), flg.end()
#define int long long
#define pb push_back
#define fi first
#define se second
#define endl "\n"
#define eb emplace_back
#define ii pair<int, int>
#define vi vector<int>
#define PI 3.141592653589793238462643383279502884
#define ll long long
#define ld long double
#define for1(i, ff, gg) for(int i = ff; i <= gg; ++i)
#define for2(i, ff, gg) for(int i = ff; i >= gg; --i)
const ll mod = 1e9 + 7;
const int maxN = 3e5 + 5;
const ll oo = 1e18 + 7;
int n, a[maxN];
int x, y, z, k;
int dbl;
vi res, ser;
int sum = 0;

bool pout(){
    // cout << sum << " " << dbl << " " << 2 * dbl << endl;
    if(sum >= dbl && sum <= 2 * dbl){
        vi ans;
        for(int cc : ser) ans.pb(cc);
        for(int cc : res) ans.pb(cc);
        for(int cc : ans) sax.pb(cc);
        answer(sax);
        return 1;
    }
    return 0;
}

#undef int
void solve(int nigga, int kigga, ll apezite, int wojafacke){
    #define int long long
    n = nigga;
    k = kigga;
    dbl = apezite;
    if(k > n) impossible();
    for1(i, 1, k - 1){
        a[i] = skim(i);
        sum += a[i];
        res.pb(i);
    }
    int l = k, r = n;
    while(l != r){
        int mid = (l + r + 1) / 2;
        int val = skim(mid);
        if(sum + val <= dbl * 2) l = mid;
        else r = mid - 1;
    }
    // cout << l << endl;
    for1(dumb, 1, k){
        a[l] = skim(l);
        sum += a[l];
        ser.pb(l);
        if(pout()) return;
        if(res.size()){
            sum -= a[res.back()]; res.pop_back();
        }
        --l;
    }
    impossible();
    #undef int
}

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 10 / 10
• Subtask 4: 15 / 15
• Subtask 5: 15 / 15
• Subtask 6: 20 / 20
• Subtask 7: 20 / 20